Find the slope of the line that passes through each pair of points

Question

1.  A(3, 4), B(4, 6)

2.   J(-8, 0), K(-8, 10)

Answer 1

1) Given A(3,4),B(4,6)

m = (6-4)/(4-3)

m = 2/1

Slope of the line AB is m = 2

2)Given j(-8,0),k(-8,10)

m = (10-0)/(-8+8)

m = 10/0

Slope of the line jk is undefined.